The major centre of gold-mining in Minas Gerais, where British-owned
mining companies were active from the 1820s. A large proportion of the
skilled workforce came from Cornwall. For a really good history of the
Morro Velho enterprise , including extensive references to individual
Cornish mining families, see Marshall C Eakin "British Enterprise in Brazil:
The St John d'el Rey Mining Company and the Morro Velho Gold Mine 1830-1960"
(Duke University Press, Durham NC 1989) ISBN 0-8223-0914-9

Jim Thompson

PS: If anyone purchases the book and can lookout for a couple of my surnames,
please contact me off-list.